Vehicle-brake.



A; A. DE MARS. VEHICLE. BRAKE.

APPLIGATIONIILBD JAN. 25. 1911.

Patented N0v.21,1911.

Cri

i like, wherein the friction and Wear involved i 'description set forth in detail certainmechi l constructed.

l roeable sleeve 2 that carries the inner brake- UNITED STATES PATENT oEEioE.4

alarmen a. mi Mans, or CLEVELAND, omo.

VEHICLE-BRAKE.

To all whom it may concern:

Be it known that I, AL'FRED DE MARS, a citizen of the UnitedStates, and a resident of Cleveland, county of Cuyahoga, and State,r ot Ohio, have invented a new and useful Improvement in Vehicle-Brakes, of which the following' is a specification, the principle of the invention being herein explained and the bestv mode in which I haye contemfy plated applyingl that principle, so as to distinguish it from other inventions.

The object of the invention is`the provision of improved braking mechanism particularly adapted for use on motor vehicles such as automobiles, power-trucks .and tliein present constructions of brake may in large part be eliminated and, at .the same time, a readier` and more 'electiverfc'oiitlolk of thebrak-ing operation is obtained. f

To the accomplishment of the foregoing and related ends said invention, then',fe`onsists of the means hereinafter fullyridescribe'dl and particularly pointed out -injthevcla' s.

The annexed drawing and the -followingf anism embodying `the inventionysuch, dis#V y closed means constituting, however', b utfone of various mechanical forms in which'the principle of the invention may be used.

In said annexed drawings-Figure 14 isY a broken rear elevation of the driving axle -of an automobile with my improved braking mechanism attached thereto and certainio the parts; and Fig. 2 is a plan View, more or less diagrammatic in character, illustrating the general arrangement and inter-connection of the parts of such mechanism.

lhe braking mechanism proper in my' improved construction, comprises a convex coneanember 1 that is carried by a sleeve 2 -so as to he longitudinally reciprocableV on the axle-housing 3 into contact with a complemeutury, or concave, cone-member 4 carried by the wheel 5 which is to be braked. This Wheel is carried and driven through a live axle G within the `housing 3 in the usual fashion, aud the disposition of said brake member 4 corresponds with that ofthe usual brake drum in automobiles, as atl present An eniergc-incy brake band 7, adapted to be operated in the usual fashion, :nav he applied to the outer surface of this member it' deemed desirable,

A coil springl 8 disposed within the recipspeeiac-a'tin of Lette-:tranne Patented N o v. 21, 1911.

application ledl'anuary 25, 1911. Serial No. 6643532.

member, abuts at one end against a shoulder onsaid sleeve, and, at the other end, against a rotatable disk 9A that is, however, held against longitudinal movement on the axle housing, although its position may be adjusted therealong. As a result of the foregoing, the tendency of the spring is to throw snidinner brake-member into engagementl driver'of the vehiele 'and connected with saidzslee've by .aA Suitable `system of intergeared'fshafts- 'llfand linkslQ, as will be readilyffnnderstood. Infother fwords, lthe inneri.brakefmembermaybe throw'n into engagement withhthe o` u'te'ry brake-member, at the 1'ol'itioii-of the driver, -byr the. simple 'move-4 mentfof the` leverjlOfand such engagement again similarly; broken. Mounted likewise .most-conveniently'upon th'erear axle housing,`falthough this is. avrnatter of indifference I so y far thellfoperative effect is concerned,.

isiaiifaiireompressorjl, preferably comprisinga plurality of cylinders so as to reduce their individualsizer'and render operation lsmooth. The" respective cylinders of this compressor are provided l,with valves 14 opening inwardly in the usual fashion to admitfair and discharge into'a common main .15 whichmay. either open to atmosphere,

or be connected by proper operation of ai valve 16 with a-storage tank 17. Operation of this discharge-controlling valve is had by means of any suitable means as aflever or the like (not shown) disposed in convenient reach ofthe operator. I

The Pistons within the respective cylinders lo the air compressor are operated from a common crank-shaft 18 disposed arallel with the vehicle axle G and carry- 'ing pinions '19 in mesh with gears Q0 fixedly. mounted upon the reoiprocable sleeves at each end of said axle. The faees of the pin'- ions 19 are sufficiently long to be retained in engagement with said gears irresl'iective of the longitudinal positions of the sleeves, as the brake members l carried by the lat ter are thrown into and out @it engagement with the complementary brake n'iembers Al. It should further be explained that there is a certain amount lof play in the connection between the operating shaft 11 and the sleeve which limit the rings movement. A

valve 23 which is located in discharge manifold before valve 16, thus completely controlling the dischargeof the air-compressor, is then connected lwith shaft, 11 so as to begin to close only after the brake members are -in engagement, ,so that thedegree of closure" maybe varied Within the further range' of movement of the operating parts' permitted ,-by the sliding connection of the ring with the sleeve. v

The general operation of the foregoing described mechanism may now bev briefly set forth. Normally the brake-1nembers 4 carried by the4 wheels are entirely free'kvfrom the members "carried by the sleeves. lVhen it is desired Ito throw on the brakes, thecompresslon springs that operate theLsleeves are freed by a preliminary actuation of'the,1e-

ver 10,150 that the sleeves rotatefwith the wheels, thereby, at .san1ejtime, rotating the crank-shaft ,18. of the compressor. Such preliminary actuation of the lever 10, honiever, does notv close the valve 23 Vthat con'- trols the discharge from the cylindersof the compressor. `The' pistons in the latter accordingly .run free until, upon further movement of the le'ver, said valve` gradually closes, finally entirely cutting off the fdis charge. The pressurejin -the cylinderscorren spondinglyv gradually rises-until a point is or for such various other reached where further rotation of thevcran'lt shaft is stopped, 'und the brake thus1 rendel-ed fully effective. Obviously, any intermediate amount of braking effect inav helsecured by a corresponding disposition of said disehargecontrolhng valve. -W'hen 1t 1s desired.. the'disch'arge pipe maybe connected,

by proper' actuationV of valve 16, with the air storage cylinder 17 and a supply of pres` sure Huid thus secured for use in filling tires,

a vehicle. as may be found desirable. In 'the normal position, lowever, of said valve, it allows the air to escape directly into the atpurposes about f I mosphere. Said valve,A it should further be explained, is operated 'independently of the discharge-controlling valve and its connections. 4

Other modes of applying' the principle of my invention may be employed instead of the one explained, change being made as` regards'the mechanism herein disclosed prov1 lowingclaims or `the equivalent oflsuch stated means be employe I therefore particularly point out and distinctly claim as. my invention :-v

1. In a vehicle, the combination with the wheel to be braked; a brake .member 'car-'65 ried thereby; a Second brake member adapted optionally to be rotated by said wheel; an air compressor geared to said second brake member and adapted to be driven thereby; a valve adapted gradually to shut 70 olf the discharge from said airtcompressor, thereby building up a pressure therein; and an air storagetank adapted toreceive suchi" discharge when desired.'l y

2. Ina. vehicle, the combination with the wheel to be braked; a' brake member carried -thereby; a second brake member movable` 2into and out of engagement tlierewith;le- 4silient means tending to throw saidl second 'element for retaining said second brake member out of'sueh engagement; an air'compresser eared. to said second brake member so 'as to e driven thereby; a valve adapted said air-compressor s as to build up pres-` -sure therein; 'and connections between said' valve and operating element, there being a lost motion betweenv the connections of said second brake member and valve with said 9 0 element, whereby said member is first thrown into engagementand said valve then operated.

Signed by me this 19th day of January, 1911.

ALFRED A. DE MARS.

Attested by`.-

ANNA L. GILL,

Jos. F. Canaux.

' ed the means stated by any of the foll. 'Y

member into sueli'engagement; an operating 80 to gradually shutl off the discharge vrin 

